stoppage vs inactiveness

stoppage and inactiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
stoppage	Yes	No	No	No
inactiveness	Yes	No	No	No

As nouns, inactiveness is a hypernym of stoppage; that is, inactiveness is a word with a broader meaning than stoppage:

Other hypernyms of stoppage include inaction, inactivity.

stoppage (noun)	inactiveness (noun)
the act of stopping something	a disposition to remain inactive or inert
an obstruction in a pipe or tube	the state of being inactive
the state of inactivity following an interruption